Michael "Miki" Eitan was born in Tel Aviv during the Mandate era. He studied law at Tel Aviv University. He joined the Herut party, and was a chairman of its youth guard before becoming a member of the party's central committee and chairman of its Ramat Gan branch.
Eitan was elected to the Knesset on the Likud list (within which Herut was a faction until 1988) in 1984, and was re-elected in 1988, 1992 and 1996, becoming coalition chairman after the latter election, having been co-ordinator of the opposition between 1992 and 1996. In 1997, Eitan was co-author of the Beilin-Eitan Agreement presented to Abu Mazen.[1] In July 1997 he was appointed Minister of Science & Technology, but was replaced by Silvan Shalom in July the following year. He then served as a Deputy Minister in the Prime Minister's Office until the 1999 elections.[2] During the Knesset term he chaired its sub-committee on communication and information and helped establish the Knesset's website.
In December 2016 Eitan was diagnosed with Parkinson's disease, which by 2021 had made him unable to function alone. In February 2021 he underwent a deep brain stimulation procedure at Hadassah Medical Center in Jerusalem, which greatly improved his condition and enabled him to lead a normal life again.[4]
Eitan is a resident of the town of Kokhav Ya'ir, and was a founder and director of the settlement project.